Waterproof and fireproof sizing



sizing which may Part. Gelatine 25 Borax 40 Potash alum 40- 'Boric acid20' Sodium thiosulfate -15 Ammonium chloride -Q. 15 Sodiumt1ingstate..- 1. 5 Water 83g the canvas or by a bath of the materialthus making the cantime cause PM Dec. 28, 1926.

mums? EFAEIETMEDQ SGMQZA VIVAS, @lii LQS ANGELES, EALIFORNI A, ASSIGNORTO N. W."

@TQWELL AND J. H. DOCKWEILER, TRUSTEES.

,WATEEPBQQ? SEIEEPROQF? SIZING..

16o Erawing. Application filed June 14, 1923, Serial No. 645,34Ff.Renewed May 26, 1926.

This invention relatesto sizing and has as anobject the provision of asizing which may be applied to canvas or other fabrics or to porousbuilding materials to render the some both water proof and fire proof.

A further object of the invention is the provision of a water proof andfire proof be applied to surfaces which are to be painted to render thesame non-porous thus reducing the amount of paint required and whichwill at the same the surface to become fire proof and water proof.

A. further object of the invention is the provision of a sizing that isadhesive in nature so that it may be used to join materials in theprocess of construction, as for instance the layers of wall boardvwhilemanufacturing the same, so as to at the same time make the finishedstructure water proof and fire proof.

The formula atpresent preferred as a physical embodiment of theinvention comrises the following ingredients in substantially theproportions named Tannic acid The SlZlllg plied to canvas abovedescribed maybe apby brushing the same upon passing the canvas throughvas both water and fire proof with great enhancement of its value forthe maklng of tents and the like.

The tannic acid in the above formula has the function of so acting uponthe gelatine or other organic adhesive which may be used as anequivalent thereof as to make the same insoluble when dry. Otherhardening agents may obviously be used for this pur ose. g 0

1V inor changes may be made in the proportion of parts and equivalentsmay be used for individual substances in the above formula withoutdeparting from the spirit-of the invention.

1 claim:

1. A sizing, comprising. in combination, a substantial amount each of anorganic adhesive, borax, potash alum, boric acid, sodium thiosulfate,ammonium chloride, sodium tungstate, a substance adapted to make theorganic adhesive insoluble when dry and water; in suitable proportionsto form a sizing which shall be waterproof and fireproof when dried. 65

2. A sizing, comprising, in combination, a substantial amount each of'gelatine, borax, alum, boric acid, sodium thiosulfate, ammoniumchloride, a tungstate, tannic acid and water. in suitable proportions toform a sizing which shall be waterproof and fireproof when dried. v

3. A sizing, comprising, in combination,

a substantial amount each of gelatine, borax, I potash alum, boric acid,sodium thiosulfate, 7 ammonium chloride, sodium tungstate, tannic acidand water, in suitable proportions to form .a sizing which shall bewaterproof and fireproof when dried.

4. A sizing, comprising, in combination, 3 gelatin 25 parts, borax40'parts, potash alum 40 parts. boric acid 20 parts, sodium thio--sulfate 15 parts, ammonium chloride 15 parts, sodium tungstate 5 parts,tannic acid 2 parts, and water 838 parts.-

FERNANDO SOMOZA VIVAS.

